One of those close friends already showing him support is his Full House love interest, Lori Loughlin, who tweeted that she couldn't wait to see him back on set of Fuller House, the highly anticipated Netflix reboot of the beloved '90s sitcom.

"Welcome home @JohnStamos!!" Loughlin wrote on Friday. "Can't wait to see you Monday! #FullerHouse."

Prior to his stint in rehab, Stamos was arrested in Beverly Hills, California on June 12 on suspicion of DUI. The Beverly Hills Police Department reported that they stopped Stamos and transported him to a local hospital for further observation due to a "possible medical condition," after they received numerous calls reporting a possible DUI driver. His court date for the incident is scheduled for September 11.

"I love him. We love him," she said about the tight-knit Full House cast. "And if this is what he needs, to spend time to get things together, we're all supportive and glad he's there and know that things will be good when he comes back. I support him, and we'll support him."